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authorLudovic Courtès <ludo@gnu.org>2015-09-02 15:23:52 +0200
committerLudovic Courtès <ludo@gnu.org>2015-09-02 23:40:07 +0200
commit4c8f997a7d6f4c9d7eae73804e9784b4562eb213 (patch)
tree57218881248955596a4092d4216bec1a7f43b130
parent4650a77ea8b3ada17f94a4a3b2004f172d0a1498 (diff)
downloadguix-4c8f997a7d6f4c9d7eae73804e9784b4562eb213.tar
guix-4c8f997a7d6f4c9d7eae73804e9784b4562eb213.tar.gz
graph: Add '--expression'.
* guix/scripts/graph.scm (%options, show-help): Add '--expression'. (guix-graph): Call 'read/eval-package-expression' for 'expression' pairs in OPTS. * tests/guix-graph.sh: Add tests. * doc/guix.texi (Invoking guix graph): Document it.
-rw-r--r--doc/guix.texi10
-rw-r--r--guix/scripts/graph.scm17
-rw-r--r--tests/guix-graph.sh5
3 files changed, 27 insertions, 5 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index 6defb0bda7..f943540ac8 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -4417,6 +4417,16 @@ the values listed above.
@item --list-types
List the supported graph types.
+
+@item --expression=@var{expr}
+@itemx -e @var{expr}
+Consider the package @var{expr} evaluates to.
+
+This is useful to precisely refer to a package, as in this example:
+
+@example
+guix graph -e '(@@@@ (gnu packages commencement) gnu-make-final)'
+@end example
@end table
diff --git a/guix/scripts/graph.scm b/guix/scripts/graph.scm
index 1719ffce68..2b671be131 100644
--- a/guix/scripts/graph.scm
+++ b/guix/scripts/graph.scm
@@ -380,6 +380,9 @@ given BACKEND. Use NODE-TYPE to traverse the DAG."
(lambda (opt name arg result)
(list-node-types)
(exit 0)))
+ (option '(#\e "expression") #t #f
+ (lambda (opt name arg result)
+ (alist-cons 'expression arg result)))
(option '(#\h "help") #f #f
(lambda args
(show-help)
@@ -397,6 +400,8 @@ Emit a Graphviz (dot) representation of the dependencies of PACKAGE...\n"))
-t, --type=TYPE represent nodes of the given TYPE"))
(display (_ "
--list-types list the available graph types"))
+ (display (_ "
+ -e, --expression=EXPR consider the package EXPR evaluates to"))
(newline)
(display (_ "
-h, --help display this help and exit"))
@@ -417,12 +422,14 @@ Emit a Graphviz (dot) representation of the dependencies of PACKAGE...\n"))
(with-error-handling
(let* ((opts (parse-command-line args %options
(list %default-options)))
- (specs (filter-map (match-lambda
- (('argument . spec) spec)
- (_ #f))
- opts))
(type (assoc-ref opts 'node-type))
- (packages (map specification->package specs)))
+ (packages (filter-map (match-lambda
+ (('argument . spec)
+ (specification->package spec))
+ (('expression . exp)
+ (read/eval-package-expression exp))
+ (_ #f))
+ opts)))
(with-store store
(run-with-store store
(mlet %store-monad ((nodes (mapm %store-monad
diff --git a/tests/guix-graph.sh b/tests/guix-graph.sh
index 199258a9b8..e0cbebb753 100644
--- a/tests/guix-graph.sh
+++ b/tests/guix-graph.sh
@@ -32,3 +32,8 @@ done
guix build guile-bootstrap
guix graph -t references guile-bootstrap | grep guile-bootstrap
+
+guix graph -e '(@ (gnu packages bootstrap) %bootstrap-guile)' \
+ | grep guile-bootstrap
+
+if guix graph -e +; then false; else true; fi